Docker mysql 主从配置详解及实例_Mysql

1、首先创建两个文件my-m.cnf（主库配置）、my-s.cnf（从库配置）

my-m.cnf 内容如下

									# Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

									#

									# This program is free software; you can redistribute it and/or modify

									# it under the terms of the GNU General Public License as published by

									# the Free Software Foundation; version 2 of the License.

									#

									# This program is distributed in the hope that it will be useful,

									# but WITHOUT ANY WARRANTY; without even the implied warranty of

									# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

									# GNU General Public License for more details.

									#

									# You should have received a copy of the GNU General Public License

									# along with this program; if not, write to the Free Software

									# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

									#

									# The MySQL Community Server configuration file.

									#

									# For explanations see

									# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

									[client]

									port    = 3306

									socket   = /var/run/mysqld/mysqld.sock

									[mysqld_safe]

									pid-file  = /var/run/mysqld/mysqld.pid

									socket   = /var/run/mysqld/mysqld.sock

									nice    = 0

									[mysqld]

									user    = mysql

									pid-file  = /var/run/mysqld/mysqld.pid

									socket   = /var/run/mysqld/mysqld.sock

									port    = 3306

									basedir   = /usr

									datadir   = /var/lib/mysql

									tmpdir   = /tmp

									lc-messages-dir = /usr/share/mysql

									explicit_defaults_for_timestamp

									log-bin = mysql-bin 

									server-id = 1 

									# Instead of skip-networking the default is now to listen only on

									# localhost which is more compatible and is not less secure.

									#bind-address  = 127.0.0.1

									#log-error = /var/log/mysql/error.log

									# Recommended in standard MySQL setup

									sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

									# Disabling symbolic-links is recommended to prevent assorted security risks

									symbolic-links=0

									# * IMPORTANT: Additional settings that can override those from this file!

									#  The files must end with '.cnf', otherwise they'll be ignored.

									#

									!includedir /etc/mysql/conf.d/

主要是这两行，只需要在原来的配置里面加上就行

log-bin = mysql-bin
server-id = 1

my-s.cnf 内容如下

									# Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

									#

									# This program is free software; you can redistribute it and/or modify

									# it under the terms of the GNU General Public License as published by

									# the Free Software Foundation; version 2 of the License.

									#

									# This program is distributed in the hope that it will be useful,

									# but WITHOUT ANY WARRANTY; without even the implied warranty of

									# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

									# GNU General Public License for more details.

									#

									# You should have received a copy of the GNU General Public License

									# along with this program; if not, write to the Free Software

									# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

									#

									# The MySQL Community Server configuration file.

									#

									# For explanations see

									# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

									[client]

									port    = 3306

									socket   = /var/run/mysqld/mysqld.sock

									[mysqld_safe]

									pid-file  = /var/run/mysqld/mysqld.pid

									socket   = /var/run/mysqld/mysqld.sock

									nice    = 0

									[mysqld]

									user    = mysql

									pid-file  = /var/run/mysqld/mysqld.pid

									socket   = /var/run/mysqld/mysqld.sock

									port    = 3306

									basedir   = /usr

									datadir   = /var/lib/mysql

									tmpdir   = /tmp

									lc-messages-dir = /usr/share/mysql

									explicit_defaults_for_timestamp

									log-bin = mysql-bin 

									server-id = 2

									# Instead of skip-networking the default is now to listen only on

									# localhost which is more compatible and is not less secure.

									#bind-address  = 127.0.0.1

									#log-error = /var/log/mysql/error.log

									# Recommended in standard MySQL setup

									sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

									# Disabling symbolic-links is recommended to prevent assorted security risks

									symbolic-links=0

									# * IMPORTANT: Additional settings that can override those from this file!

									#  The files must end with '.cnf', otherwise they'll be ignored.

									#

									!includedir /etc/mysql/conf.d/

同样，主要的是这两行

log-bin = mysql-bin
server-id = 2

2、OK，有了配置文件，就可以启动MySQL了，先启动主库

$ docker run -d -e MYSQL_ROOT_PASSWORD=admin --name mysql-master -v /soft/my-m.cnf:/etc/mysql/my.cnf -p 3307:3306 mysql

3、启动从库

$ docker run -d -e MYSQL_ROOT_PASSWORD=admin --name mysql-slave -v /soft/my-s.cnf:/etc/mysql/my.cnf -p 3308:3306 mysql

4、连接主库，并运行以下命令，创建一个用户用来同步数据

$ GRANT REPLICATION SLAVE ON *.* to 'backup'@'%' identified by '123456';

5、查看主库状态

$ show master status;

记住File、Position的值，如果没查到数据，请检查第一、第二步，配置问题。
我查出来的是mysql-bin.000004、312

6、连接到从库，运行以下命令，设置主库链接

$ change master to master_host='121.32.32.54',master_user='backup',master_password='123456',
master_log_file='mysql-bin.000004',master_log_pos=312,master_port=3307;

7、启动同步

$ start slave;

8、查看同步状态

$ show slave status

如果看到Waiting for master send event.. 什么的就成功了，你现在在主库上的修改，都会同步到从库上

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